Members of congress wear many different hats and play many roles during the course of their work. an important role while spending time in their home districts is that of

constituent servant

Explanation:

              Members of the Congress are composed of the members of the Senates and the House of Representatives. Each member are the representative of a particular constituency of States and addresses the constituencies problems and concerns.

             The Congressmen primary duty is to make law for the country, help the concerning constituency, representing the constituency's people at the house and address to their problems.

             Congressmen work for the betterment of their constituency which in turn works for the betterment of the whole country as a whole.

            Thus the members of the congress plays an important role of "constituent servant" when they are at their home district.

Hence the answer is ---

constituent servant

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.